Figure 2

Phylogenetic analyses of the partial polymerase region of the detected norovirus genomes. Phylogenetic trees were inferred under a maximum-likelihood framework from the nucleic acid sequences aligned at the protein level (GTR model with aLRT node support, see Material and Methods for details). The aLRT node supports were only indicated when superior to 0.8 and relevant to the genotype identification. Reference NoV strains identified as highly related to the norovirus (NoV) samples were highlighted in bold, italic blue font. NoV samples originating from the same outbreak and co-localized in the phylogenetic tree were also highlighted in color. Identical NoV sequences were represented on the same node (in color if originating from the same outbreak, in black if originating from different outbreaks). Details on the genotyping of each NoV sample can be found in Table 1.